package com.ruoyi.lvlian.util;
import java.text.DecimalFormat;
import com.ruoyi.lvlian.domain.TrackInfo;

public class CoordinateConverter {
    private static final double pi = 3.14159265358979324;
    private static final double a = 6378245.0;
    private static final double ee = 0.00669342162296594323;


    /**
     * WGS-84 to GCJ-02
     *
     * @param lat
     * @param lon
     * @return
     */
    public static GPS gps84_To_Gcj02(double lat, double lon) {
//        if (outOfChina(lat, lon)) {
//            return null;
//        }
        double dLat = transformLat(lon - 105.0, lat - 35.0);
        double dLon = transformLon(lon - 105.0, lat - 35.0);
        double radLat = lat / 180.0 * pi;
        double magic = Math.sin(radLat);
        magic = 1 - ee * magic * magic;
        double sqrtMagic = Math.sqrt(magic);
        dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
        dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
        double mgLat = lat + dLat;
        double mgLon = lon + dLon;
        return new GPS(mgLat, mgLon);
    }

    private static double transformLat(double x, double y) {
        double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));
        ret += (20.0 * Math.sin(6.0 * x * Math.PI) + 20.0 * Math.sin(2.0 * x * Math.PI)) * 2.0 / 3.0;
        ret += (20.0 * Math.sin(y * Math.PI) + 40.0 * Math.sin(y / 3.0 * Math.PI)) * 2.0 / 3.0;
        ret += (160.0 * Math.sin(y / 12.0 * Math.PI) + 320 * Math.sin(y * Math.PI / 30.0)) * 2.0 / 3.0;
        return ret;
    }

    private static double transformLon(double x, double y) {
        double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));
        ret += (20.0 * Math.sin(6.0 * x * Math.PI) + 20.0 * Math.sin(2.0 * x * Math.PI)) * 2.0 / 3.0;
        ret += (20.0 * Math.sin(x * Math.PI) + 40.0 * Math.sin(x / 3.0 * Math.PI)) * 2.0 / 3.0;
        ret += (150.0 * Math.sin(x / 12.0 * Math.PI) + 300.0 * Math.sin(x * Math.PI / 30.0)) * 2.0 / 3.0;
        return ret;
    }

    private static boolean outOfChina(double lat, double lon) {
        if (lon < 72.004 || lon > 137.8347)
            return true;
        if (lat < 0.8293 || lat > 55.8271)
            return true;
        return false;
    }

    public static class GPS {
        private double wgLat;
        private double wgLon;

        public GPS(double wgLat, double wgLon) {
            this.wgLat = wgLat;
            this.wgLon = wgLon;
        }

        public double getWgLat() {
            return wgLat;
        }

        public double getWgLon() {
            return wgLon;
        }
    }


    public static Double formatDouble(double number) {
        // 创建DecimalFormat对象，指定保留4位小数的格式
        DecimalFormat df = new DecimalFormat("#.####");

        // 格式化数字，保留4位小数，并转换为Double类型
        String formattedString = df.format(number);
        Double formattedNumber = Double.valueOf(formattedString);

        return formattedNumber;
    }

    public static void main(String[] args) {
        TrackInfo t =new TrackInfo();
        // 测试用例  126.749825
        double wgs84Latitude = 39.908791;
        double wgs84Longitude = 116.397450;

        GPS result = gps84_To_Gcj02(wgs84Latitude, wgs84Longitude);
        System.out.println("GCJ-02 Latitude: " + result.getWgLat());
        System.out.println("GCJ-02 Longitude: " + result.getWgLon());

        double originalNumber = 3.1415926;

        // 保留4位小数
        Double formattedNumber = formatDouble(originalNumber);

        System.out.println("Formatted number: " + formattedNumber);
    }
}
